moulton



3 SheetsSheet 1.

(No Model.)

G. MOULTON.

PANTOGRAPH ENGRAVING MACHINE.-

No. 445,321. Patented Jan.2'7,1891

Wmm

lNVENTOR (No Model.) 3 Sheets-Sheet 2.

G. MOULTON.

PANTOGRAPH ENGRAVING MACHINE. No. 445,321. Patented Jan. 2'7, 1891.

1NVENTOR 3 SheetsSheet 3.

(No Model.)

G. MOULTON.

PANTOGRAPH ENGRAVING MACHINE.

N0.445.321.- Patented Jan. 2'7, 1891.

INVENTOR men STATES PATENT OFFICE.

GEORGE MOULTON; OF MANCHESTER, ENGLAND.

PANTOGRAPH ENGRAVlNG-IVIACHINE.

SPECIFICATION forming part of Letters Patent No. 445,321, dated January2'7, 1891.

Application filed November 26, 1889. Serial No. 331,6 (N0 model.) Ptented in England J annary 14, 3 1

To all whom it may concern:

Be it known that I, GEORGE MOULTON, a subject of the Queen of GreatBritain and Ireland, residing at 76 \Vhitley Street, Rochdale Road,Manchester, in the county of Lancaster, England, have invented certainnew and useful Improvementsin Pantograph Engraving-Machines, (patentedin Great Britain January 14., 1888, N0. 597,) of which the following isa specification.

My invention relates to the so termed pantograph engraving-niacinneswhich are used in the tracing or engraving of designs upon articlespreparatory to the subsequent etching operations, as is well understood.

The principal object of my invention is to render the machine betteradapted to operate upon comparatively small obj ects-as, for on ample,my improved machine is well adapted for operating upon glass articles;but I do not limit myself to the indicated uses for the machine. I carrythe article to be engraved upon a table or carrier, which is fitted torevolve upon a vertical axis, and I move the tracer vertically, the twomotions being derived from the pantograph apparatus. Two or more tablesmay be arranged at different levels, and one, two, or more tables may bemounted at one level. The tables in a set at one level are connectedtogether, and are also connected with the pantograph apparatus. Onetracer only may act upon each article, or two or more. A number oftracers may be arranged around the axis of revolution of one table, andsuch number may correspond to the repeats of the pattern or to a divisorof such repeats.

The nature of my invention will be best understood when the saidinvention is more fully described with reference to the three sheets ofdrawings which are attached hereto.

Figure 1 represents a side elevation of my improved engraving apparatusapplied to a pantograph-machine, which is not entirely shown for want ofspace. Fig. 2 is a sectional plan of the engraving apparatus andexhibits the pantograph-machine more fully. Fig. 3, drawn to a largerscale, is a sectional elevation of one of the tables a, which carry thework, and exhibits, also, one of the tracers with its connected parts.

It must be understood that the pantographmachine may be of any suitableconstruction,

and it has not,therefore,been considered necessary to show it in itsentirety in the drawings.

In the said drawings, a a are tables which carry the work to be engravedand are mounted to vibrate upon vertical axes. In the example eight ofthese tables are arranged in sets of four attwo levels, one set beingcarried above the other set. The left-hand table in the lower set isleft 'out in Fig. 1, in order to show the templet more clearly. Thistemplet will be referred to hereinafter. Each table is attached to theupper end of a hollow shaft a, which is provided with two steel centers0. One of these centers rests in a seating in the upper end of a postI), which is inside the said hollow shaft, and the other center isadjusted to work in a second seating formed in the lower end of thepost, this latter center being carried by an arm a which is attached toa wheel (1 upon the lower end of the hollow shaft. It will be seen thatthe table will be at liberty to move with very little friction partlyaround the vertical axis passing through the points of the two centers.The four posts 1) which carry the four tables in the lower set aresecured by their lower ends to the bed or framing of the machine. Thefour upper posts are secured to a frame which is attached to a centralfixed column 0. The tables are provided with sliding jaws or dogs or areotherwise suitably adapted to hold the work. In the case of one of thetables in Fig. l a glass globe is represented as fixed in position to beengraved.

The tracers are carried by annular parts (I,

which I will term tracer-carriers. The four tracer-carriers in each setare attached to a cross-head e, and the two cross-heads are connectedtogether by means of rods ff. Each tracer is carried by a bcll-cranklever g, which is hinged to a bracket g, which is secured upon thetracer-carrier and is adjustable thereon in position around the verticalaxis of motion of the table a and also toward and from the said axis. Inthe case of one of the tables two tracers are shown; but it must beunderstood that all the eight tracer-carriers are similarly provided,one, two, three, or more tracersbeingappliedaroundeachtable,asmay berequired. hat I will term the vertical arm of the lever g carries thetracer, the

ICO

end of the horizontal arm projecting above a plate h. The tracer is keptin contact with the work by the action of a spring which bears againstthe said vertical arm. A weigh t. might be used in placeof this spring.Itwill be seen that if the plate It were raised the tracers would bewithdrawn from the work, and on the contrary if the plate were loweredthe tracers would be permitted to return toward the work. The said plateis provided with a hollow boss, which is fitted to slide within the eyeof the tracer-carrier, as seen in Fig. 3.

All the eight plates in the two sets are connected together by means oflevers and rods, so that when one moves vertically all the eight platesmove in unison. This connection is effectedby means of levers t' i,whichare hinged at jj and are connected by their shorter arms with the bossesof the plates h. The ends/of the longer arms are coupled together and tovertical rods which connect together the levers iand i, which are inconnection with the two sets of tables. The lever 11, which is to theleft hand in Fig. l, is fixed upon a shaftj, which extends from side toside of the arrangement, and also carries the corresponding lever uponthe other side of themachine. Upon the same shaft is fixed a lever 7'which is provided with a bowl j which is kept in contact by the weightof the parts wit-h a templet 7r, which is made of the same contour asthe side of the work to be engraved, It will be seen that if thecross-heads c c are raised in a vertical line the eight tracer-carriersd will have the same movement and the tracers and the bowl 7'" will beraised in the same degree in contact with the work and the templet. Asthe said bowl moves in contact with the templet it follows the curvatureor contour of the same and imparts a rocking movement to the shaft 7,whereby the levers upon the said shaft raise or lower the plates 72,with which they are connected, and by their connections with the otherlevers and the connecting-rods effect the corresponding raising orlowering of all the other plates in the two sets. The levers g are soproportioned that the movements of the plates h shall correspond withthe movements of the tracers. The result of this is that the platesfollow the ends of the horizontal arms of the levers g in theirmovements, so that the said plates are always but a short distance fromthe said ends of the arms and are in positions to act promptly when itis desirable to withdraw the tracers from the work. If preferred, theuse of a templet might be dispensed with.

The engraving or tracing upon the work is effected by a combination ofthe rotating or rocking movements of the tables a and the verticalmovements of the tracers due to the movements of the cross-heads e e,which carry the tracer-carriers, as aforesaid. The crossheads 0 e areprovided with spindles c, upon which are fixed wheels 6 which run uponvertical planed bars 1* r, whereby the said cross-heads are guided tomove up and down in a straight line.

The rocking movements of the tables are derived from a wheel Z. (Seen inFig. 2.) This wheel is connected by steel bands with the reciprocatingframe 771., which moves in a direction across the machine, as indicatedby the arrows. The vertical movements of the said tables are derivedfrom the bars a of a frame which moves in directions at right angles tothe movements of the frame m. These parts m and n roll upon wheels andare connected with the tracer-arm of the pantographmachine. In Fig. 2, 0represents a part of the said tracer-arm, the end carrying the. tracernot appearing for want of space in the drawings. The movements areconveyed to the frames by means of inclined adjustable slides, so thatthe movements of the tracer over the pattern are conveyed in adiminished ratio to the frames, as is well understood, the constructionof the pantograph apparatus not being claimed herein as novel. One ofthese inclined slides appears at w in Fig 2. This slide transmitsmovement to the frame m, which is connected by means of bands Z with thewheel Z, and this wheel is connected by other bands with two bars 19 p,which are mounted to move endwise in a straight line with a minimum offriction, as in ordinary pantograph-machines. These bars 10 p areconnected by bands (1 with wheels q (1, each bar connecting two of thelast-named wheels with the main wheel Z. It will be seen that when thewheell is rotatedto any extent in either direction all the four wheels(1 (1 will receive a corresponding circumferential movement in the samedirection. The

wheels (1 q are fixed upon the hollow shafts.

a, which carry the four tables in the lower series. The wheel Z is fixedupon a shaft which extends upward and carries a second wheel Z, which isconnected with four wheels g, which are upon the hollow shafts whichcarry the tables in the upper set. The effect of this arrangement isthat all the eight tables receive motion from the wheel Z,which isactuated by the pantograph, as aforesaid, so that the work upon thetables is caused to revolve partly upon the axes of movement of the saidtables when the frame at is moved. The cross-heads e e, which areconnected together by means of the rods ff, as aforesaid, are raised andlowered by means of a wheel r, which is fixed upon a shaft 7*. Upon thesame shaft are fixed two wheels 8 s, which rest upon the pantograph-barsn n, so that as ICC these bars move the said shaft is caused to 7.

turn upon its axis. The connection of the two cross-heads e e iseffected by means of four rods, two of these appearing in full in Fig.1, the other two being indicated by dotted lines. These latter two areextended downward and appear at f f in Fig. 2. The lower ends of theserods f are connected to gether by means of a bar f and are attached toone end of a band '1", which passes over and is attached to the wheel 0,and is connected by its other end with a load 6, which is adjusted tobalance the weight of the crossheads 0 e, the tracer-carriers (Z (Z, andall the other vertically-moving part-s carried by the said cross-heads.It will be seen that when the bars 92 move in either of the directionsindicated by the arrows the cross-heads e e,

and as a consequence the whole of the tracers on the levers will beraised or lowered, as

the case may be. It will thus be apparent that as the pantograph-tracertravels over the pattern and the parts on n are moved to and fro thepattern will be reproduced upon the work by the combination -of therevolving motion of the work and the vertical movements of the tracers.

All the tracers can be withdrawn from action by means of a lever-u.(Indicated by the dotted lines in Fig. 1.) This lever may be adapted tobe acted upon by the foot of the operator. The upper end of this levercarries the templet k. \Vhen the front end of the lever-that is, the endwhich does not appear in the drawingsis depressed, the templet is movedin the direction indicated by the arrow, and by acting upon the levereifects the withdrawal of all the tracers by reason of theirhereinbefore-deseribed connection with the lever j".

I do not confine myself to the number of tables to carry the work ineach set, as there might be less than four or there might be more thanfour. It will be seen that each of the bars p might be connected withmore than two band-wheels, or the wheel Z might impart movement to morethan two bars, fulfilling the office of the bars 1); also, if preferred,there might be more than two sets of tables arranged at diiferentlevels; butit is obvious that a multiplication of the tables wouldincrease the work, which the pantograph apparatus would have to do, sothat if there were too many tables there would be a diffieulty incorrectly following the lines of the pattern. If preferred, the tablescarrying the work might be raised and lowered and the tracer-carriers berotated or vibrated upon vertical axes.

hat I claim as my invention is- 1. In a pantograph engraving-machine,the combination, with a plurality of tables mounted and adapted tovibrate upon vertical axes, of a hollow shaft, a post inside the same,and means for imparting both a vertical and rotary motion to saidtables, substantially as set forth.

2. In a pantograph-machine, the combination, with a plurality of tablesmounted and adapted to vibrate upon vertical axes, of a hollow shaft, apost inside the same, and two steel centers on said hollow shaft, one ofwhich rests in a seating in the upper and the other in the lower end ofthe said post, thelatter center being carried by an arm attached to thewheel upon the hollow shaft, whereby it is moved, substantially asspecified.

In a pantograph-machine, the combination, with the tables a, hollowshaft ct, provided with centers a post 1) within said hollow shaft,wheels q, bands g connected therewith, barsp,an d cross-heads 6,connected by arms f f, of the shaft r wheel 0', fixed thereto, bars atn, and wheels 3 s, resting thereon, whereby when said bars move motionis V communicated to the cross-heads e e and said tables are moved,substantially as specified.

at. In a pantograph-machine, the combination, with the tracer-carriers(Z, tracer-levers q, plates N, levers t' i, rods 2' shaft j, bowlj, andtemplet Z, of the cross-heads e e, rods f f", connecting the same,wheel-shaft 0*, wheel 1', mounted thereon, wheel 5, and bar 72, wherebymotion is imparted through the crossheads to the tracers, substantiallyas specified.

5. The bars 0;, the spindles e, the wheels Z Z, the cross-heads c, therodsff, the barf the band r, the wheel 0', the weight If, the wheels 5,and the bars 11, in combination with a pantograph-machine, substantiallyas and for the purpose set forth.

6. The tables a, the hollow shaft a, the centers (t the posts 1), thewheels 1 q,the bands (1 the bars 27, the bands Z, the wheel Z, the frame171, the tracer-carriers d, the tracer-levers q, the springs (1 theplates 71., the levers i t', the rods t the shaft j, the lever j, thebowl j, the templet 7c, the bars 91., the spindles e", the wheels 6 thecross-heads c, the rods ff, the bar f, the band '1", the wheel 0, theweight 25, the wheels .9, the shaft .9, and the bars '72, in combinationwith a pantographmachine, substantially as and for the purpose setforth.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

GEORGE MOULTON.

llitnesses:

DAVID FULTON, FREDK. DILLON.

